Tidy up redundant use declarations. (#3333)

This is just a minor code cleanup.

cranelift/jit/src/backend.rs

@@ -13,9 +13,6 @@ use cranelift_module::{
     DataContext, DataDescription, DataId, FuncId, Init, Linkage, Module, ModuleCompiledFunction,
     ModuleDeclarations, ModuleError, ModuleResult, RelocRecord,
 };
-use cranelift_native;
-#[cfg(not(windows))]
-use libc;
 use log::info;
 use std::collections::HashMap;
 use std::convert::{TryFrom, TryInto};
@@ -25,8 +22,6 @@ use std::ptr;
 use std::ptr::NonNull;
 use std::sync::atomic::{AtomicPtr, Ordering};
 use target_lexicon::PointerWidth;
-#[cfg(windows)]
-use winapi;
 
 const EXECUTABLE_DATA_ALIGNMENT: u64 = 0x10;
 const WRITABLE_DATA_ALIGNMENT: u64 = 0x8;

crates/lightbeam/src/error.rs

@@ -1,4 +1,3 @@
-use capstone;
 use thiserror::Error;
 use wasmparser::BinaryReaderError;
 

crates/test-programs/wasi-tests/src/bin/fd_flags_set.rs

@@ -1,5 +1,4 @@
 use std::{env, process};
-use wasi;
 use wasi_tests::open_scratch_directory;
 
 unsafe fn test_fd_fdstat_set_flags(dir_fd: wasi::Fd) {

crates/test-programs/wasi-tests/src/bin/nofollow_errors.rs

@@ -1,4 +1,3 @@
-use libc;
 use more_asserts::assert_gt;
 use std::{env, process};
 use wasi_tests::{assert_errno, open_scratch_directory};

crates/test-programs/wasi-tests/src/bin/symlink_create.rs

@@ -1,4 +1,3 @@
-use libc;
 use more_asserts::assert_gt;
 use std::{env, process};
 use wasi_tests::open_scratch_directory;